Ganesh Chaturthi — known in Tamil Nadu as Vinayagar Chaturthi and in Telugu-speaking regions as Vinayaka Chavithi — marks the day traditionally celebrated as the birth of Lord Ganesha. It falls in the Hindu month of Bhadrapada, usually between late August and September.
Ganesha is among the most beloved and widely worshipped deities in Hinduism. He is the elephant-headed son of Shiva and Parvati, and is invoked at the start of almost anything new — a journey, a business, a wedding, a first day at school — because he is revered as Vighnaharta, the remover of obstacles, and as the deity of wisdom and auspicious beginnings.
Before any new venture, Ganesha is remembered first.
In many homes the festival begins by bringing a clay Ganesha idol into the house and giving it a seat of honour. In some families this is a single day of worship; in others the idol stays for three, five, seven or ten days before a farewell immersion called visarjan. The length is a matter of family and regional tradition rather than a fixed rule.